This was contained in the latest UN data released on Thursday, with nearly nine in 10 killings since 2006 still unresolved.
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The UN agency stated that between 2006 and 2020, over 1,200 professionals lost their lives the same way.
She was until her new appointment the Senior Special Adviser to the President on Women Affairs and Administration.
Alidou noted that the issues, if not properly addressed, had a negative impact on investments the Federal Government had made in line with achieving the Education for All Goals 2015